Computational Studies of the Dynamics of Fluid Interfaces in Microfluidics2014.10.10

报告题目:Computational Studies of the Dynamics of Fluid Interfaces in Microfluidics

报    人: 王野春



报告介:Motion of viscous droplets or menisci driven by external flows, gravityor imbalancedinterfacial tension is getting more attention as technologies evolve towards small scales. For example, in pharmaceutical applications, fluid droplets in microfluidic channels are utilized as “micro-reactors” to precisely control the reaction rate. In Fluorescence Activated Cell Sorters in clinical applications, droplets are used as carriers to sort and collect biological cells.  In capillary-based lithography, the dynamics of liquid bridge formed between the depositing tip and the substrate determines the deposition process for the lithography. The ability to numerically simulate in a fast and accurate manner the dynamics of a small volume of fluid is thus demanded.The presenter and co-workers have developed a 3D Spectral Boundary Integral Algorithm for interfacial dynamics in Stokes flow. This method achieves an exponential convergence and good numerical stability. It allows us to precisely predict droplet motion and interfacial dynamics, reveal the underlying physics, and provide advice on device design and operation. Several applications of the method arepresented, including the droplet motion in a square microfluidic channel, droplet motion incurred by a steady electric field, dynamics of liquid bridge etc.

报告人简介:Dr. Yechun Wang is an assistant professor in Mechanical Engineering at North Dakota State University (NDSU) since 2009. She obtained her Bachelor’s degree in Chemical Engineering and Technology from East China University of Science and Technology in 2001. She then earned a Ph.D. in Chemical Engineering in2007 at the University of Maryland, College Park, and worked as a PostDoctoral Fellow in Coatings and Polymeric Materials at NDSU from 2007 to 2008. She has graduated 5 Masters and one Ph.D.Her research interests include Microfluidics, Complex Fluids, Biofluid Mechanics, Computational Fluid Dynamics, Numerical Analysis, and Characterization of Organic Coatings.